The JBO Thread Plug Gauge is a precision tool designed to verify metric coarse thread holes with confidence. It’s ideal for machinists, quality inspectors, engineers, and hobbyists who need quick, reliable confirmation that a hole will accept a mating M1.6 x 0.35 coarse-thread component. Built for left-hand applications, this gauge combines accuracy with practicality to keep your production or workshop workflow moving smoothly.

• Go/No-Go design for fast tolerance checks: Quickly determine if a threaded hole is within spec or needs adjustment, reducing inspection time and preventing mismatches.
• Hardened steel construction for durability: Resists wear and maintains accuracy through heavy use, giving you a long-lasting gauge you can depend on.
• Left-hand metric coarse thread calibration (M1.6 x 0.35, 6H): Specifically tuned for left-hand coarse threads, ensuring precise measurements and consistent results in your applications.

Used correctly, this gauge streamlines quality control, speeds up assembly checks, and helps ensure every part fits as intended. Its rugged construction and precise calibration support reliable results in demanding environments, making it a trustworthy choice for any shop or QA process.